"Red Horn Coral is a remarkable gemstone material originating over 340 million years ago. Agate replaced the original coral with stunning orbs and sprays of red. Gemstone: Red Horn Coral Size: 17.8x25.8x4.7 mm Weight: 16.1 ct Cut: Cabochon Shape: Raindrop Clarity: Opaque Origin: Utah Enhancement: (N) - None 100% natural The goal of Bright Star Gemstones is to provide one-of-a-kind gemstones cut from hard-to-find and interesting lapidary materials. Shipping & Guarantee Free USPS First Class M